I would like to add that this upgrade also removed an "electronic glare" that was plaguing my system. This upgrade made a huge difference as much as my Hidiamond D9 ICs and bypassing the amp's PS electrolytics with .22uf V-Cap CuTF caps.
One point of concern: The attenuator is placed on the side panel, towards the rear of the amp, about 3 inches from the heat sinks. I noticed that the volume pot and knob does adsorb heat. I highly doubt that the sound quality will be affected do to the low temperature coefficient of the resistors (TX2575 TC is at 1ppm). I'm concerned for the attenuator's ability to stand the test of time with continuous heating and cooling.
One point of concern: The attenuator is placed on the side panel, towards the rear of the amp, about 3 inches from the heat sinks. I noticed that the volume pot and knob does adsorb heat. I highly doubt that the sound quality will be affected do to the low temperature coefficient of the resistors (TX2575 TC is at 1ppm). I'm concerned for the attenuator's ability to stand the test of time with continuous heating and cooling.